A quick look at this kit by Caffel of this 3D printed kit that is available on Cults3D. This system is designed to feed proprietary 3D-printed shells from a dedicated front-loading magazine. Concurrently, the standard AAP-01 magazine handles the supply of BBs and gas, ensuring the core firing mechanism remains intact. A notable feature of this design is its dual capability: the kit can be used with shells for a more immersive experience or without them, allowing the user to maintain standard airsoft skirmish gameplay. Please note that due to the mechanics of the shell ejection system, traditional brass shells are incompatible, requiring the use of the included printed shells.